The subject of electrical discharges in gases is a very general one which encompasses many other fields, such as plasma chemistry and laser processes, while it, in turn, makes use of results obtained in such allied areas as the physics of collisions. This lack of clearly defined boundaries creates inevitable difficulty for someone attempting to compile an exhaustive list of published papers in the field.

http://ieeexplore.ieee.org/iel7/7731603/7731604/07731993.pdf

Electrical breakdown in gases

Plasma broadening and shifting of non-hydrogenic spectral lines: present status and applications

In this paper, we report modifications of well known semiempirical and semiclassical approximation furmulas for Stark line-width calculations. Comparisons with experiments for doubly ionized atoms yield, as an average ratio of measured to calculated widths 1.06 ± 0.31 for a modified semiempirical formula and 0.96±0.24 for a modified semiclassical formula. For triply ionized atoms these ratios are 0.91±0.42 and 1.08±0.41, respectively. Comparison with other theoretical calculations have also been made.

Stark widths of doubly- and triply-ionized atom lines☆

Experimental Stark widths and shifts for spectral lines of neutral and ionized atoms A critical review of selected data for the period 2001–2007 ☆

Regularities and similarities in plasma broadened line widths have been studied by a comprehensive analysis of existing experimental data. Regularities are expected on the basis of general atomic structure considerations, and should be evident for spectral series, for corresponding transitions in homologous atoms and in isoelectronic sequences. Furthermore, similarities of line widths are expected for multiplets, supermultiplets and, to a lesser degree, for transition arrays. A comprehensive examination of literature data has been undertaken, which shows generally a close adherence of the measured data to the expected regularities. A few notable exceptions are also given.

Regularities and similarities in plasma broadened spectral line widths (Stark widths)

Stark-broadening regularities of prominent multiply-ionized-oxygen spectral lines in plasma.

Stark broadening and regularities of prominent multiply ionized nitrogen spectral lines.

Stark Broadening of Nix and NM Lines

Stark broadening of F II and Cl III lines.

Stark widths of five Ne III, five Ne IV, one Ar III and nine ArIV spectral lines have been measured in a linear-pinch discharge plasma. The results were compared with existing experimental and theoretical results, and used to establish several types of regularities. Electron densities determined with single-wavelength laser interferometry were 2.18·1023 m−3 and 2.80·1023 m−3 in neon and argon plasma, respectively. The electron temperatures determined from the Boltzmann slope of several Ne III spectral lines, and ratios of Ne III to Ne IV or Ar III to Ar IV spectral lines were 59 000 K and 42 000 K in neon and argon plasma, respectively. The investigated spectral lines originate predominantly, from 3s–3p and 3s′–3p′ Ne III and Ne IV, and from 4s–4p and 4s′–4p′ Ar III and Ar IV transition arrays. The emphasis is on the Stark width (θ) dependence on the upper level ionization potential (I), the emitter core net charge (z) and electron temperature (T) for a given electron density. This dependence was found to be of the form: θ=az2T−1/2I−b, wherea andb are constants within(i) several stages of ionization of neon or argon and(ii) within nitrogen like (NI, O II, F III and Ne IV) 3s–3p or phosphorus like (P I, S II, Cl III and Ar IV) 4s–4p transition arrays. The established overall trends were used to predict the Stark widths of univestigated spectral lines originating from the given transition arrays.

Stark broadening and regularities of ionized neon and argon spectral lines

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